Hi Stefan,
On Wed, Jul 13, 2016 at 2:03 PM, Stefan Roese sr@denx.de wrote:
This simple driver provides some functions to control some of the integrated devices. The watchdog is enabled per default. This driver adds a function to disable the watchdog. Also the internal legacy UART (io address 0x3f8/0x2f8) is enabled per default.
Signed-off-by: Stefan Roese sr@denx.de Cc: Bin Meng bmeng.cn@gmail.com Cc: Simon Glass sjg@chromium.org
drivers/misc/Kconfig | 8 ++++++ drivers/misc/Makefile | 1 + drivers/misc/nuvoton_nct6102d.c | 57 +++++++++++++++++++++++++++++++++++++++++ include/nuvoton_nct6102d.h | 29 +++++++++++++++++++++ 4 files changed, 95 insertions(+) create mode 100644 drivers/misc/nuvoton_nct6102d.c create mode 100644 include/nuvoton_nct6102d.h
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 2373037..5d212a3 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -90,6 +90,14 @@ config MXC_OCOTP Programmable memory pages that are stored on the some Freescale i.MX processors.
+config NUVOTON_NCT6102D
bool "Enable Nuvoton NCT6102D Super I/O driver"helpIf you say Y here, you will get support for the NuvotonNCT6102D Super I/O driver. This can be used to enable ordisable the legacy UART, the watchdog or other devicesin the Nuvoton Super IO chips on X86 platforms.config PWRSEQ bool "Enable power-sequencing drivers" depends on DM diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index 066639b..1b0c7b6 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_I2C_EEPROM) += i2c_eeprom.o obj-$(CONFIG_FSL_MC9SDZ60) += mc9sdz60.o obj-$(CONFIG_MXC_OCOTP) += mxc_ocotp.o obj-$(CONFIG_MXS_OCOTP) += mxs_ocotp.o +obj-$(CONFIG_NUVOTON_NCT6102D) += nuvoton_nct6102d.o obj-$(CONFIG_NS87308) += ns87308.o obj-$(CONFIG_PDSP188x) += pdsp188x.o obj-$(CONFIG_$(SPL_)PWRSEQ) += pwrseq-uclass.o diff --git a/drivers/misc/nuvoton_nct6102d.c b/drivers/misc/nuvoton_nct6102d.c new file mode 100644 index 0000000..38355db --- /dev/null +++ b/drivers/misc/nuvoton_nct6102d.c @@ -0,0 +1,57 @@ +/*
- Copyright (C) 2016 Stefan Roese sr@denx.de
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <common.h> +#include <nuvoton_nct6102d.h> +#include <asm/io.h> +#include <asm/pnp_def.h>
+static void superio_outb(int reg, int val) +{
outb(reg, WDT_EFER);outb(val, WDT_EFDR);+}
+static inline int superio_inb(int reg) +{
outb(reg, WDT_EFER);return inb(WDT_EFDR);+}
+static int superio_enter(void) +{
outb(0x87, WDT_EFER); /* Enter extended function mode */
Can we use a macro for 0x87 if possible?
outb(0x87, WDT_EFER); /* Again according to manual */return 0;+}
+static void superio_select(int ld) +{
superio_outb(0x07, ld);
Can we use a macro for 0x07 if possible?
+}
+static void superio_exit(void) +{
outb(0xAA, WDT_EFER); /* Leave extended function mode */
Can we use a macro for 0xaa (lower case) if possible?
+}
+/*
- The Nuvoton NCT6102D starts per default after reset with both,
- the internal watchdog and the internal legacy UART enabled. This
- code provides functions to disable the watchdog and the UART
- if this is needed on platforms.
- */
+int nct6102d_wdt_disable(void) +{
superio_enter();/* Select logical device for WDT */superio_select(NCT6102D_LD_WDT);superio_outb(NCT6102D_WDT_TIMEOUT, 0x00);superio_exit();return 0;+} diff --git a/include/nuvoton_nct6102d.h b/include/nuvoton_nct6102d.h new file mode 100644 index 0000000..297cef4 --- /dev/null +++ b/include/nuvoton_nct6102d.h @@ -0,0 +1,29 @@ +/*
- Copyright (C) 2016 Stefan Roese sr@denx.de
- SPDX-License-Identifier: GPL-2.0+
- */
+#ifndef _NUVOTON_NCT6102D_H_ +#define _NUVOTON_NCT6102D_H_
+/* I/O address of Nuvoton Super IO chip */ +#define NCT6102D_IO_PORT 0x4e
Is this I/O address configurable at several predefined address? eg: can be 0x4e, or 0x6e depending on some I/O strap pins. If it is configurable, maybe we need add a parameter for the APIs that this driver provides for the caller to pass the I/O address.
+/* Extended Function Enable Registers */ +#define WDT_EFER (NCT6102D_IO_PORT + 0)
WDT_ prefix looks odd to me? Should it be NCT_?
+/* Extended Function Index Register (same as EFER) */ +#define WDT_EFIR (NCT6102D_IO_PORT + 0) +/* Extended Function Data Register */ +#define WDT_EFDR (WDT_EFIR + 1)
+/* Logical device number */ +#define NCT6102D_LD_UARTA 0x02
Is this needed?
+#define NCT6102D_LD_WDT 0x08
+#define NCT6102D_UARTA_ENABLE 0x30
Is this needed?
+#define NCT6102D_WDT_TIMEOUT 0xf1
+int nct6102d_wdt_disable(void);
+#endif /* _NUVOTON_NCT6102D_H_ */
Regards, Bin